Latch



. R. J. ROATH.

LATCH.

APPLICAHON FILED MAR.2.192\.

Patented Jan. 17, 1922.

IN VEN TOR.

A TTORNE Y.

UNITED STATES ROLLIN J. ROA'IH, F OGDEN, UTAH.

LATCH.

Application filed March 2, 1921.

To all whom it may concern Be it known that I, ROLLIN J. ROATH, a citizen of the United States, residin at Ogden, in the county of \Veber and tate of Utah, have invented certain new and useful Improvements in Latches, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to improvements 1n latches, and more particularly to a latch adaptedfor use in holding closed doors and other hinged closures which must be compressed in position.

An important object of the invention is to provide a latch of this type, the locking part of which is simultaneously shiftable and rotatable, the shifting of the locking part bringing the same into alineinent with the closure to be held in position and the rotation thereor" causing the compressing of the closure to insure proper seating thereof, A structure of this type is particularly well adapted for use in connection with the doors of grain elevators in flour or grain mills wherein a very close seating of the door is necessary in order to prevent dusting out of the chute. p

A further object of the invention is to provide a latch wherein the locking part when withdrawn is automatically held in withdrawn position whereby the breakage commonly occurring due to engagement of the door with the locking part in its return to closed position is prevented.

Other objects and advantages of the invention will become apparent throughout the course of the following'description.

In the accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein like reference characters designate like parts throughout,

Figure 1 is a plan view showing my lock, the parts being shown in the released position in solid lines and the locked position in dotted lines;

Figure 2 is a side elevation thereof, showingthe parts in solid lines in the locked position and the dotted lines in the released position;

Figure 3 is a longitudinal sectional view taken therethrough;

Figure l is a section on the line 4-4; of J igure 2;

Figure 5 is a section on the line 55 of Figure 3, and

i Specification of Letters Patent.

Patented Jan. 17, 1922.

Serial No. 449,029.

Figure 6 is a top plan view of the pivot 3m. 1 Referring now more particularly to the drawings, the numeral 10 indicates a chute or receptacle, and the numeral 11 a door adapted to coact with the chute or receptacle to close the same. The door 11 is preferably provided at the locking point with a wear plate 12. To the chute or receptacle adjacent the door and alined with the wear plate 12 thereof, a guide plate 13 is secured which embodies upstanding parallel flanges H directed toward the wear plate and each provided upon its upper extremities with inwardly directed flanges 15.

The numeral 16 indicates a locking part slidably fitting between the inner or adjacent edges of the flanges and embodying oppositely extending pivot portions 17 extending beneath the flanges 15 and prefer-- ably slidably engaging the inner or adjacent faces of the flanges 14. The locking part 16 embodies a rear extension 18 which, when the locking part 16 is slid toward the door within the guides adapted to overhang the wear plate 12 so that rotation of the locking part upon its pivots l7, will'cause the underface of the extension 18 to engage the plate to wedge or cam the door or closure 11 into position. a v r Secured'to the chute or receptacle 10 by means of ears 19 is a casing 20 having rotatably mounted in the upper wall thereof, a

pin 21. The pin 21 has its upper end ex.-

tending through the'plate and polygonal in form for coaction with a similarly shaped opening formed eccentrically in a disc 23, the disc being held in position by means of a headed screw 24c or the like. The lower portion 21 of the pin 21, or that portion projecting into the casing 20, is ovoid in cross section for a purpose presently to appear;

The plate 23 is provided upon a portion of its periphery with an upstanding mar inal flange 25 which is tapered throughout lts len th and which is provided at its upper extremity with an inwardly directed flange 26 overhanging the plate. An extremity of the flange 25 is turned outwardly from the plate to form a gripping or operating handle 27. The locking part 16 embodies a tongue 28 passing about the flange 26 and engaging therebeneath.

An inspection of the drawings will, it is believed, render the operation of my device obvious, but the same is herein set forth in the gripping portion 27 is engaged and the disc '23 rotated, the outer surface of the flange thereof engaging the locking portion and causing the same to shift longitudinally because of the eccentric mountingFof the plate 23. Rotation of the locking part 16 about its pivotexce t as imparted thereto by the increase in heig it of the flange 25, is effectually prevented by the tongue 28 and at the same time a positive rotation is given to this locking part so that at the time the locking part is properly positioned upon the wear plate it applies considerable pressure thereto. In order to prevent warping and twisting of the plate 23 from the strain to which it is subjected in rotating thelocking part and wedging the door 11 in closed position, I provide upon the plate 13 at the end thereof adjacent the casing 20, a pair of upstanding supports 29 which engages the under surface of the plate 23 as the same approaches theoperative position at opposite sides of the point at which the strain is a plied thereto and fully support the same. 11 order that the disc 23 may be held against accidental rotation when in either the operative or inoperative position, I secure within the casing 20 a spring 30 engaging against the ovoid portion 21 of the pin 21.

from the foregoing it is believed to be obvious that I have constructed a latch furthermore be obvious that the construction as hereinabove set forth is capable of some change in modification without materially departing from the spirit of my invention, and I accordingly do not limit myself to such specific structure except as hereinafter claimed.

lVhat I claim is:

1. In a latch, parallel guides, a locking member longitudinally shiftably and pivotally mounted within said guides, a rotatable disc disposed adjacent said guides and provided with an eccentric flange, said flange being tapered longitudinally, said flange embodying portions having interlocking engagement with said locking member Whereby said locking member is simultaneously longitudinally shifted within said guides and rotated about the pivot thereof when said disc is rotated.

2. In a latch, parallel guides, a locking member longitudinally shiftably and pivotally mounted within said guides, a rotatable disc disposed adjacent said guides and provided with an eccentric flange, said flange being tapered longitudinally, said flange embodying portions having interlocking engagement with said locking member whereby said .locking member is simultaneously longitudinally shifted within said guides and rotated about the pivot thereof when said disc is rotated, and means assoclated with said disc for retaining said disc in ad- -centrically pivoted disc disposed adjacent said guides and provided with a marginal cam flange, embodying a portlon having interlocking engagement with a portion of said locking member. a

In testimony whereof I hereunto aflix my signature. 7

ROLLIN J. ROATI-l; 

